Merging windows in Safari

[levitynyc]

Is there a command to do it without clicking the menu bar?

 

[Mac OS X Ocelot]

Is there a command to do it without clicking the menu bar?

You can probably make one. Open the Keyboard and Mouse preferences in system prefs and click keyboard shortcuts. Make a new one for Safari and type the exact command name ("Merge All Windows") and type whatever shortcut you want. That should work. Make sure to close and reopen Safari too.